Software Engineer – C++

TrustThink; San Diego (CA); On-site; USD 120,000 - 170,000; Full time

Job summary

TrustThink seeks a mid- to senior-level C++ Software Engineer to design, develop, and maintain high-assurance systems in a hands-on role. You will build system services, APIs, and Qt-based UI components, with a focus on security and reliability.

The position is on-site in San Diego, CA, and requires strong C++ skills, code quality focus, and collaboration with security teams. The ideal candidate has 3–10+ years of software development experience, proficiency in Git, networking basics, and

Qualifications

• BS in Computer Science, Engineering, or related field (or equivalent experience).
• 3–10+ years of professional software development experience.
• Strong proficiency in C++.
• Experience with Git-based version control.
• Familiarity with networking fundamentals (TCP/IP, TLS, HTTPS).
• Experience working in Agile/Scrum environments.
• Strong written and verbal communication skills.

Responsibilities

• Design, develop, and maintain high-assurance software systems in C++.
• Develop Qt-based user interface components and supporting application logic.
• Build and integrate secure communications interfaces, APIs, and system services.
• Develop modular, maintainable software aligned with system and security requirements.
• Participate in architecture discussions, code reviews, and technical design reviews.
• Develop automated tests and contribute to CI/CD workflows.
• Collaborate closely with engineering, security, and systems teams.

Skills

C++

Git

TCP/IP

TLS/HTTPS

Agile/Scrum

Communication

Qt

Embedded systems

Education

BS in Computer Science/Engineering

Tools

Qt Framework

Job description

We are seeking a mid- to senior-level C++ Software Engineer to develop high-assurance cryptographic systems. This is a hands-on C++ development role focused on development of system services, APIs, business logic, and Qt-based user interface components. The ideal candidate brings strong C++ skills with an emphasis on code quality, security, and reliable system design. This position is full-time and on-site in San Diego, CA.

Responsibilities

• Design, develop, and maintain high-assurance software systems in C++
• Develop Qt-based user interface components and supporting application logic
• Build and integrate secure communications interfaces, APIs, and system services
• Develop modular, maintainable software aligned with system and security requirements
• Participate in architecture discussions, code reviews, and technical design reviews
• Develop automated tests and contribute to CI/CD workflows
• Collaborate closely with engineering, security, and systems teams

Desired Background

• BS in Computer Science, Engineering, or related field (or equivalent experience)
• 3–10+ years of professional software development experience
• Strong proficiency in C++
• Experience with Git-based version control
• Familiarity with networking fundamentals (TCP/IP, TLS, HTTPS)
• Experience working in Agile/Scrum environments
• Strong written and verbal communication skills

Preferred Experience (any subset)

• Experience with embedded or resource-constrained systems
• Experience with UI frameworks (Qt preferred)
• Experience developing RESTful services or backend systems
• Familiarity with cryptographic concepts or secure communications

• Active Secret clearance is required

Company Description

Founded in 2018, TrustThink is a cybersecurity engineering firm that designs, builds, and secures mission-critical systems. We specialize in environments where software, communications, cryptography, and physical systems come together, including defense platforms, connected transportation, autonomous systems, and other safety-critical technologies.

Our teams solve challenging engineering problems involving secure communications, cryptographic key management, high-assurance software, and resilient system architectures. From early architecture and prototyping through software development, integration, and testing, we help turn advanced security concepts into systems that operate in real-world mission environments.